Weather will likely play an important role when you plan your trip to Wyndham, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually November and October, with an average temperature of 31°C, while the coldest months are July and June, with an average of 25°C. The rainiest months in Wyndham are January, February, December and March, with each month seeing an average of 195 mm of rainfall.